EP3666700B1 - Device for winding and winding replacement for web-shaped material and method for same - Google Patents

Description

The invention is directed to a device for winding up and changing laps of web-shaped material according to the preamble of claim 1 and a method for this according to the preamble of claim 8.

Winders are used to wind up web-shaped materials, such as plastic films, paper webs, metal foils or textiles. The material webs to be wound come directly from the manufacturing process and are put into rolls, so-called laps, for further processing.

Winders are also used for films, for example from blown film lines. Tubular films are formed in these systems at high speeds and, after being laid flat, must be continuously wound onto reels without reducing the production speed in the system.
Once the roll has reached a predefined size, it has to be changed; this also happens without stopping the production of the endless material web or changing the production speed. There are different mechanical engineering options and processes here.

The known winding devices include turret winders, contact winders and center winders.

In the case of a turret winder, one or two opposite turntables are rotatably mounted in a machine frame and accommodate at least two rotatably mounted winding points. In operation, a first winding point is in the winding position and a second winding point is in a loading or unloading position in order to receive a new winding shaft or to deliver a finished winding. If the lap has reached its target size in the winding position, the first and the second winding point change their position by turning the turntable and the next lap can be wound up. The disadvantage here is that a large amount of space is required for large winding diameters.

An alternative to the turret winders are winders with a linear movement of the winding positions, including contact and center winders

With the contact winders, the roll to be wound is pressed against a driven contact roller, the roll is not driven separately. A so-called pre-winding point is necessary for these winders.

In the case of the central winder, the lap is driven centrally in the winding point. At the same time, it can be pressed against the contact roller or operated with a gap to the contact roller.

The disadvantage of the two last-mentioned winders is that when a roll is changed, the winding must be transferred from the pre-winding point to the winding point. The pressure of the roll against the contact roller is not defined, so that different winding conditions arise.

Winders are designed for left-hand winding, right-hand winding or both types. The winding direction of the web-shaped material depends on the subsequent process steps and on which side of the film must be on top for this process step. The left or right winding allows the pretreated side (corona), which is printed in a subsequent process step, to be wound inside or outside. Furthermore, the arrangement of the sealing layer in the coextrusion composite during extrusion is independent of a required internal or external arrangement during winding. The winding shaft then has the corresponding direction of rotation.

In the DE 44 28 249 a center winder is disclosed. The winding device has two winding points which are arranged in a winding frame and which work in conjunction with a contact roller. The winding shafts of the two winding stations are each driven independently by motors. The winding points can be moved on horizontal guide rails between the winding point and the delivery point for the finished lap. The contact roller is motor-driven and can be lowered. When changing the winding position it is vertically down between the winding position and move to a parking position. The new winding shaft is inserted in the idle state, while the second winding shaft is in the operating state.

The disadvantage of this design is that the winding shaft bearing requires an additional drive. This design of a center winder requires a defined winding direction, depending on the requirements, it is not possible to choose between right or left winding.

the EP 2 261 152 A1 discloses a winder having a front winding base frame and a rear winding base frame each provided with winding arms that hold winding shafts to be able to vertically rise and descend, the winding arms being attached to the front winding base frame and the rear winding base frame, to be exchanged between the front winding base frame and the rear winding base frame. A front contact roller frame and a rear contact roller frame are each provided with contact rollers to vertically ascend and descend, and the contact rollers are attached to the front contact roller frame and the rear contact roller frame to be interchangeable between the front contact roller frame and the rear. In this winder, while the winding shaft is in pressure contact with the contact roller, it is forwarded from the front winding base frame to the rear winding base frame.

the EP 1 947 043 A1 discloses a winding device for winding a continuously tapering material web onto successively provided winding shafts with the formation of coils of the material web on the winding shafts, comprising a contact roller rotatably mounted in the winding device, via which the material web to be wound can be felt and transferred to the winding shaft or the coil forming thereon is, a winding station with a winding shaft receiving device for receiving and rotatable mounting of a winding shaft, the winding shaft receiving device being displaceable relative to the contact roller from a winding position to a removal position according to the diameter of the coil forming on the winding shaft and a rotary drive for the recorded winding shaft, a winding shaft feed for feeding a new winding shaft to be exchanged for the winding shaft wound with the material web into the winding shaft receiving device, a transverse cutting device for transversely cutting the material web in the course of a winding shaft change, the winding shaft receiving device each comprising two winding shaft receiving stations Have rotary drive for the winding shafts and can be moved independently of one another between the winding position and the removal position and the winding shaft receiving stations alternately receive a winding shaft that is currently to be wound, while the respective other winding shaft receiving station can be moved into an insertion position for inserting a new winding shaft between the winding position and the removal position and before actuation the transverse cutting device can be moved into the initial winding position with the new winding shaft picked up, sow ie a method for carrying out a winding shaft change.

Films are structured differently in terms of their number of layers and the types of material used in the layers. They do not have to be symmetrical in their layer structure. Each blown film has a tube inside and a tube outside. When winding, it is desirable that, depending on the type of film layers and the type of further processing of the film, a special side is on the outside or inside. To make this possible, it is important that winders are designed to be both right and left winding.

The invention is therefore based on the object of creating a solution which makes it possible to provide a winder which enables left-hand winding as well as right-hand winding and wherein the winder is designed without a pre-winding point.

In the case of a winder of the type described at the outset, the object is achieved according to the invention by the characterizing part of claim 1.

The winder according to the invention has a winding point arranged in a machine housing. This winding station has two central drives that alternate come into use.

The central drives are arranged one on each side of the machine housing. These work together with a driven winding shaft guide. The respective central drive is coupled to the driven winding shaft guide and moved on guides between a parking position and a winding position. The central drives are used alternately. The central drive in use is coupled with the winding shaft guide, the second central drive is permanently coupled in its waiting position.

In one embodiment of the invention, the central drives are arranged on the outside of the machine frame and interact with the winding shaft guide arranged inside, which moves on essentially horizontal guides, ideally on horizontal guides.
In a preferred embodiment, the winding shaft also lies on a support which is arranged parallel to and above the winding shaft guide. The central drive is preferably coupled in the waiting position on the machine housing or a separate frame.

In the winding position, a contact roller unit interacts with the winding shaft or the winding. The contact roller unit is designed to be movable, e.g. pneumatically or electrically. It can be moved essentially horizontally between the winding position and a contact roller parking position. The contact roller unit comprises the contact roller, a guide and the pressure. Alternatively, the roll can also be wound with a gap, then the contact roller does not press against the roll, the film runs over the contact roller.

Separating devices are arranged above and below the contact roller unit. They have two functions. On the one hand, they raise or lower the film web during the winding change in order to bring the new winding shaft into the winding start position; on the other hand, they separate the film web during the winding shaft change process. The separation and lifting can also be carried out in separate devices, so that above and below the Contact roller unit each have a lifting or lowering unit and a separate separating device are arranged.

The device also has a winding shaft transport unit for the newly inserted winding shafts. It is designed essentially vertically and arranged in the area between the winding shaft guide and the contact roller unit. Depending on the winding direction, the new winding shaft is transported from above or below via the winding shaft transport unit to the winding level above or below the film web.

In the event that the winding is wound clockwise, the new winding shaft is moved from below with the aid of the winding shaft transport unit onto the winding level.
In the event that the roll is to be wound counter-clockwise, the winding shaft is inserted into the winding shaft transport unit from above and driven down with it onto the winding plane.

In a preferred embodiment, the new winding shafts can be transported to the first-mentioned winding shaft transport unit via further winding shaft transport units and can be transferred to the latter so that they can be transported in the direction of the winding plane.

Alternatively, the winding shafts are fed into the machine from the side and placed in the winding shaft transport unit.

In a method for winding and changing laps, the object is achieved according to the invention by the characterizing part of claim 8.

In the method according to the invention, a winding shaft is picked up by a first central drive and the shaft winding guide in the winding operation. The central drive drives the winding shaft and the film web, which is guided to the winding shaft via a contact roller, is wound onto the winding shaft. The contact roller is pressed against the roll. The contact roller is designed to be movable for this purpose. The winding moves, while its diameter increases, with the Central drive and the winding shaft guide in the direction of the roll dispenser, away from the contact roller. The contact roller presses permanently against the roll so that no air is wrapped in, the film does not run and thus can guarantee a uniform roll quality with a defined contact force. The roll is wound up until the target diameter is reached.

If the target diameter of the lap is reached, the lap change is prepared. First, the winding shaft feed and the winding shaft change for the case of right-hand winding are described.
A new winding shaft is inserted into the winding shaft transport device and guided upwards into a first parking position in front of the winding plane.

The finished roll with the first central drive and the winding shaft guide is moved in the direction of the deposit arms of the roll dispenser.
This movement is achieved by drives on the winding shaft guide. In the front position, the central drive decouples from the winding shaft guide and is permanently coupled to its end position, for example to the machine housing wall. The central drive continues to drive the lap. The contact roller unit moves back a little, away from the winding position. Now the second central drive, on the opposite side of the first central drive, decouples from its parking position and couples with the winding shaft guide. The winding shaft guide and the second central drive coupled to it move in the direction of the contact roller unit to the winding position.

The winding position does not represent a fixed location, but is the position in which the central drive, in cooperation with the contact roller, winds the web-shaped material onto the roll. As the roll diameter increases, the position moves further and further on the guides in the direction of the roll dispenser.

The new winding shaft is now moved with the winding shaft transport unit from the first parking position further upwards in the direction of the winding plane into a second parking position. The lower separating device is swiveled into the course of the film as a lifting device and the film web is lifted to make space for the new winding shaft. The winding shaft guide moves with the second Central drive in a winding start position. The new winding shaft is moved further up from the second parking position to the winding start position. The winding shaft is now coupled to the second central drive and the winding shaft guide and moved together into the winding position. The second central drive now drives the winding shaft.

The receptacle for the winding shaft of the winding shaft transport unit is moved downwards, the contact roller unit moves to the winding shaft, the lower separating device swivels into the cutting position and the film is separated. Depending on how they are carried out, these steps run very quickly or at the same time.
The film is now wound onto the new winding shaft by the second central drive.

The remaining web of material is wound onto the finished roll by the first central drive. The first central drive is decoupled from the finished lap and the finished lap is released from the winder via the roll dispenser. The roll dispenser can be hydraulic.

The winding shaft feed and the winding shaft change for the case of left-hand winding are described below.
A new winding shaft is inserted into the winding shaft transport unit and moves to a first parking position above the winding level. The finished roll with central drive moves in the direction of the roll shaft guide
Roll dispenser is placed in front of the placement arms and the first central drive decouples itself from the winding shaft guide and couples into its park position while it continues winding. The new winding shaft is moved to a slightly lower parking position above the winding level. The contact roller moves backwards from its winding position. The upper separating device swivels down and pushes the material web down a little. The second central drive decouples from its parking position and into the winding shaft guide and moves in the direction of the winding position. The new winding shaft now has sufficient space and is moved to the winding start position. The winding shaft is with the second Central drive and the winding shaft guide coupled. The central drive drives the winding shaft.

The winding shaft guide with the second central drive and the new winding shaft now move into the winding position.
The holder for the winding shaft of the winding shaft transport unit is moved downwards. The upper separating device moves back to its upper parking position, the contact roller moves to the new winding shaft. The lower separating device swivels in and the material web is separated. Depending on how they are carried out, these steps take place very quickly or at the same time.
The new roll is wound up and the finished roll leaves the winder via the roll dispenser.

The lifting or pushing and cutting functions of the separating devices can also be implemented in separate devices, both for left-hand and right-hand winding.

Alternatively, the winder can also be designed for winding with a gap, in which case the contact roller does not have to be pressed against the winding.

Such a winder enables permanent winding without the winding conditions changing due to undesired external disturbances. The material web is wound from the start under defined conditions such as web tension and contact pressure and does not experience any interference from external influences, as they otherwise occur at pre-winding points, due to the transfer of the lap from the pre-winding point to the winding point. The winding has a stable winding core and there are no differences between different winding layers, as there is no pre-winding point. In addition, the winder enables left and right winding.

Further details, features and advantages of the subject matter of the invention emerge from the subclaims and from the following description of the associated drawings, in which - by way of example - a preferred embodiment of the invention is shown.

• Figur 1 : eine Seitenansicht des erfindungsgemäßen Wicklers
• Figur 2 : eine Seitenansicht des Wicklers beim Wickelwechsel für den Fall des Rechtswickelns
• Figur 3 : eine Seitenansicht des Wicklers beim Wickelwechsel für den Fall des Linkswickelns

In the drawings shows:

• Figure 1 : a side view of the winder according to the invention
• Figure 2 : a side view of the winder when changing laps for the case of right-hand winding
• Figure 3 : a side view of the winder when changing laps for the case of left winding

In Figure 1 a preferred embodiment of the winder (1) according to the invention for winding and changing the winding of film webs, especially tubular films, is shown.
The winder (1) has a machine housing (2). A first central drive (3) and a second central drive (4) are arranged on guides (5) on both sides of the machine housing (2) in an area of the winder (1). A driven winding shaft guide (6) is arranged at the same height on the inside of the machine housing (2). This works together with the central drives (3) or (4) and moves them back and forth on the horizontal guides (5). The central drives (3) and (4) take up winding shafts.

On one side of the guides (5) in which Figure 1 on the right, a roll dispenser (14) is arranged, while on the other side of the guides (5), in the Figure 1 left, a vertical shaft transport unit (8) and a contact roller unit (9) is arranged. A support (13) for the winding shafts is arranged above and parallel to the guides (5).
A horizontal winding shaft transport unit (7) is arranged below this structural unit, which takes new winding shafts and transports them below the winding shaft guide (6) in the direction of a second vertical winding shaft transport unit (8) which transports them upwards towards the winding position. The vertical winding shaft transport unit (8) can also pick up new winding shafts from above and transport them downwards in the direction of the winding position if the winding is to be wound in the opposite winding direction.
In a second area of the machine housing (2) (in the Figure 1 left) at the level of the guides (5) is a contact roller unit (9). It interacts with the winding shaft (15) or the winding (17) that is being formed. she is here for example executed pneumatically movable. A deflection roller (10) is arranged behind it. A separating device (11, 12) is arranged below and above the contact roller unit (9) or the winding plane. They have the function of lifting, lowering or separating the film web.
On the opposite side of the machine frame (2) receiving the contact roller unit (9), following the guides (5) (in FIG Figure 1 right) the hydraulic roll dispenser (14) is arranged.

With the help of Figure 1 the winding up of a film web is described first. The winding shaft (15) is coupled to a first central drive (3) arranged on the outer wall of the machine housing (2) and the driven winding shaft guide (6) arranged on the inside of the machine housing (2). This first central drive (3) winds the film web (16) in the winding position (WP), which is guided into the winder (1) via the deflection roller (10). The contact roller unit (9) presses against the winding shaft (15) or against the roll (17). As the diameter increases, the roll (17) moves with the roll shaft guide (6) and the first central drive (3) in the direction of the roll dispenser (14). The winding shaft rests on a support (13) arranged on both sides of the machine housing (2).

When the roll (17) has reached its target diameter, the winding shaft change is prepared.

The winding change is now initially for right-hand winding Figure 2 described. For this purpose, a new winding shaft (18) is inserted into the horizontal winding shaft transport unit (7) arranged below and transported in the direction of the vertical winding shaft transport unit (8), transferred to it and moved up to a parking position 1 (PP1). The first central drive (3) and the winding shaft guide (6) move the finished roll (17) in the direction of the laying arms (19) of the roll dispensing device (14). The second central drive (4) is in its parking position (PP) (not shown here). Now the contact roller unit (9) is horizontally away from the roll (17) (in the Figure 2 to the left), moved out of its wrapping position. The new winding shaft (18) is moved further up from park position 1 (PP1) to park position 2 (PP2). Of the The first central drive (3) of the finished roll (17) decouples itself from the winding shaft guide (6) and couples to the outside of the machine housing wall (2) in its parking position PP and continues to rotate the roll (17). Some of these steps take place at the same time. The second central drive (4) decouples from its parking position (PP) on the machine housing wall (2) and couples with the winding shaft guide (6) and is moved in the direction of the contact roller unit into a winding start position (cf. Figure 1 ). The lower separating device (12) is swiveled into the film web (16) and lifts it so that the new winding shaft (18) can move from the parking position 2 (PP2) to the winding start position. Now the winding shaft guide (6) with the second central drive (4) moves into the winding start position in which the new winding shaft (18) is located and the second central drive (4) couples with the winding shaft (18) and drives the winding shaft (18).
The hook (20) of the vertical winding shaft transport unit moves down. The winding shaft guide with the second central drive and the winding shaft move into the winding position (WP). The lower cutting device (12) swivels into the cutting position. The contact roller unit (9) moves to the new winding shaft (18). The film web (16) is separated and the lower separating device (12) swivels back. The new coil is formed. These steps can be carried out very quickly but also at the same time.
The finished roll (17) can now be released from the winder (1) via the roll dispensing device (14).

The lap change is now used for left-hand winding Figure 3 described. It is assumed that the roll (17) in the winder (1) is being wound up with the first central drive (3). For left-hand winding of film webs, the new winding shaft (18) is inserted from above into the vertical winding shaft transport unit (8) and moved to a parking position 1 (PP1) above the winding level. The first central drive (3) and the winding shaft guide (6) move the finished roll (17) in front of the depositing arms (19) of the roll dispensing device (14). The second central drive (4) is in its parking position PP. Now the contact roller unit (9) is removed from the roll (17) (in the Figure 1 to the left) moved out of its wrapping position. The new winding shaft (18) is moved from park position 1 (PP1) in the direction of the winding plane into the park position 2 (PP2). The first central drive (3) of the full roll (17) is decoupled from the winding shaft guide (6) and is coupled to the outside of the machine housing wall (2) in its parking position (PP). Some of these steps take place at the same time. The second opposite central drive (4) decouples from its parking position (PP) in the machine housing wall (2) and couples with the winding shaft guide (6) and both move in the direction of the contact roller unit (9), into the winding start position (cf. Figure 3 ). The upper separating device (11) is pivoted into the film web (16) and presses the film web (16) downwards so that the new winding shaft (18) can move from the parking position 2 (PP2) to the winding start position. Now the winding shaft guide (6) with the second central drive (4) moves into the winding start position in which the new winding shaft (18) is located and the second central drive (4) couples with the winding shaft (18) and drives the winding shaft (18).
The hook (20) of the vertical winding shaft transport unit (8) moves down. The winding shaft guide, the second central drive and the new winding shaft move into the winding position (WP). The upper separating device (11) swivels back. The lower cutting device (12) swings up into the cutting position. The contact roller unit (9) moves to the new winding shaft (18). The film web (16) is separated and the lower separating device (12) swivels back. These steps can be carried out very quickly but also at the same time.

The new coil is formed. The finished roll (17) can now be released from the winder (1) via the roll dispensing device (14).

Reference number

1

Winder

2

Machine housing

3, 4

Central drives

5

guides

6th

driven winding shaft guide

7th

horizontal winding shaft transport unit

8th

vertical winding shaft transport unit

9

Contact roller unit

10

Deflection roller

11, 12

Lifting and separating device

13th

Support

14th

hydraulic roll dispenser

15th

Winding shaft

16

Film web

17th

Wrap

18th

new winding shaft

19th

Support arms

20th

hook

PP

Parking position

PP 1

Parking position 1

PP 2

Parking position 2

WP

Wrapping position

Claims (14)

1. Device (1) for winding and reel change of web-like materials comprising

   - a machine housing (2) with guides (5) for a reel shaft guide (6),

   - two central drives (3, 4) drivable independently of one another to drive reel shafts (15),

   - a contact roller unit (9) which cooperates with the reel shaft (15) driven by the respective central drive (3, 4) in the winding position (WP),

   - separating devices (11, 12) for separating the web-like material (16),

   - reel shaft transport units (7, 8) to feed new reel shafts (18) for reel shaft change,

   - a roller issuing device (14),
   characterised in that

   - a drivable reel shaft guide (6), which cooperates with in each case one of the central drives (3, 4) and moves them on the substantially horizontal guides (5) between a parking position (PP) and a winding positions (WP),

   - in that the central drives (3, 4) are arranged on the outer side of the machine housing (2) and cooperate with the reel shaft guide (6) arranged within the machine housing (2),

   - in that for a reel shaft change, the reel shaft guide (6) together with a first central drive (3), which drives the finished reel (17) on a reel shaft (15), can be moved from the winding position (WP) to the parking position (PP),

   - in that the first central drive (3) can be uncoupled from the reel shaft guide (6) and can be coupled into its parking position (PP),

   - in that a second central drive (4) can be coupled to the reel shaft guide (6) and can be moved from its parking position (PP) into the winding position (WP) where the second central drive (4) can be coupled to a new reel shaft (18) and can be driven,

   - in that the contact roller unit (9) can be moved in the direction of the new reel shaft (18) and cooperates with the latter,

   - and in that the web-like material (16) can be severed by the separating device (11, 12) and can be wound to form a new reel.
2. Device (1) according to claim 1, characterised in that the new reel shaft (18) for right-hand winding of the web-like material (16) can be transported from below via a reel shaft transport unit (8) into the winding position (WP).
3. Device (1) according to claim 1 or 2, characterised in that the new reel shaft (18) for left-hand winding of the web-like material (16) can be transported from above via a reel shaft transport unit (8) into the winding position (WP).
4. Device (1) according to claim 1, 2 or 3, characterised in that the separating units (11, 12) are arranged above and below the winding position (WP) of the reel shaft (18) and execute alternatively raising, lowering and separating of the web-like material (16).
5. Device (1) according to claim 4, characterised in that for right-hand winding, the web-like material (16) can be raised and cut through by means of the lower separating unit (12).
6. Device (1) according to claim 5, characterised in that for left-hand winding, the web-like material (16) can be pressed downwards by means of an upper separating unit (11) and can be cut through with the aid of a lower separating device (12).
7. Device (1) according to one of the preceding claims, characterised in that the web-like material (16) constitutes film webs, composite film webs or tubular films.
8. Method for winding and reel change of web-like material (16) having the step:

   - winding the web-like material (16) on a first reel shaft (15) which is driven by a first central drive (3), wherein the first central drive (3) cooperates with a driven reel shaft guide (6), wherein for winding the reel (17), the reel shaft (15) cooperates with a contact roller unit (9),

   characterised in that
   the reel change comprises the further steps:

   - moving the finished reel (17), which is driven by the first central drive (3), with the aid of a drivable reel shaft guide (6) from the winding position (WP) into a parking position (PP),

   - uncoupling the first central drive (3) from the reel shaft guide (6) and coupling it into its parking position (PP), wherein the first central drive (3) continues to drive the reel (17),

   - coupling the reel shaft guide (6) to a second central drive (4) and moving the second central drive (4) from its parking position (PP) into the winding position (WP),

   - coupling the second central drive (4) to a new reel shaft (18) and driving the new reel shaft (18),

   - moving the contact roller unit (9) in the direction of the reel shaft (18),

   - separating the web-like material (16) using separating devices (11, 12) and winding the new reel,

   - depositing the finished reel (17) with the aid of a roller issuing device (14),

   - wherein the central drives (2, 3) are arranged on an outer side of a machine housing (2) with substantially horizontal guides (5) for the reel shaft guide (6), and the reel shaft guide (6) is arranged within the machine housing (2).
9. Method according to claim 8, characterised in that a new reel shaft (18) for right-hand winding of the web-like material (16) is moved from below via a reel shaft transport unit (8) into the winding position (WP).
10. Method according to claim 8 or 9, characterised in that a new reel shaft (18) for left-hand winding of the web-like material (16) is moved from above via a reel shaft transport unit (8) into the winding position (WP).
11. Method according to claim 10, characterised in that during left-hand winding of the web-like material, the separating unit (11) arranged above the winding position (WP) falls in with the web-like material (16) and presses it downwards, the reel shaft (18) is moved into the winding position (WP), the contact roller unit (9) is moved into the winding position (WP) and the upper separating device (11) pivots back, then the lower separating unit (12) falls in with the web-like material (16) and severs the web.
12. Method according to claim 11, characterised in that during right-hand winding of the web-like material (16), the separating device (12) arranged below the winding position (WP) falls in with the web-like material (16) and raises it, the reel shaft (18) is moved into the winding position (WP), the contact roller unit (9) is moved into the winding position (WP) and the lower separating device (12) pivots into the cutting position and severs the web.
13. Method according to one or more of claims 8 to 12, characterised in that the method is carried out in a device (1) according to claims 1 to 7.
14. Method according to one or more of claims 8 to 13, characterised in that the web-like material (16) constitutes film webs, composite film webs or tubular films.

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